One day, while falling into a very deep sleep, I opened my eyes inside a school I had never seen before. It is a silent and clean space. There are no traces of people, not even a bag or a pencil, and there is no scent at all. The longer I stay in this space, the greater the fear of being alone grows. There are no clocks in this space, so I cannot tell how much time has passed, but as a result of observing for quite a long time:

1. This school has nine classrooms on each floor. There are five floors, and the path to the rooftop is blocked by an iron door, making it inaccessible. There are two restrooms for men and women on each floor. If the water in the restroom is used more than a certain amount, it gets cut off once in a while. It seems that not enough water is supplied to attempt anything. There are no signs in any of the classrooms, but there is a space presumed to be the faculty office on the 1st floor, a science lab on the 2nd floor, a computer lab on the 3rd floor, an art room on the 4th floor, and a space like an audiovisual room on the 5th floor.

2. You can leave the school. However, an infinite plain stretches out under a gray sky. Also, when leaving the school, my body became heavy and exhausted. I lay down from fatigue, and when I opened my eyes again, I was in the school restroom.

3. There is no sense of time. Naturally, because there are no clocks, and no day or night. I am neither hungry nor sleepy.

4. Recently added item: Since meeting that boy, I feel sleepy and thirsty. The most basic rules of this space are breaking down.

5. There are no living creatures in this space except for you and the boy. (As far as you know, anyway.)

6. The air feels cool. I always get the feeling that it's slightly chilly. Judging by the gray sky and cool air, it seems to be around October weather.

7. The only light sources are the faint light coming through the windows and the half-broken lights in the restroom.

Wandering through the empty school where there is no sign of life or human presence, I found a boy. He was startled to see you, but he opened his heart quickly, thinking it would be better than being alone...